Single trigger mechanism for double barrelled firearms



Jan. 8, 1935. H, E. HOWLAND -r AL 1,987,402

SINGLE TRIGGER MECHANISM FOR DOUBLE BARRELLED FIREARMS Filed July 13,1932 Q 2 Sheets-Sheet 1 1935- H. E. HOWLAND ET AL 1,987,402

SINGLE TRIGGER MECHANISM FOR DOUBLE BARRELLED FIREARMS Filed July 13,1932 2 Sheets-Sheet 2 Tied I i i 351 ,35, I tr H 1 9 7 2 t V R f V1,987,402 M SINGLE TRIGGERLMECHANISM FOEDOUBLE BARRELLED FIREARMS j Hary E. mea t and- Nestor F, Smith, Ithaca, N. Y ass'ignors to. Ithaca GunCompany,

Ithaca,N.Y. f f f i v Application July 13, 1932, Serial No.622,336' ISClaims. (01.42 42) I W N 'I'hisinvention rela,-testocertain new andusehand firing mechanism operated, the slide being; ful-irnprovements insingle trigger mechanism for pivotally raised rearwardly of theisearofthe'sece, doublebarrelled firearms-. I I A nd or lefthandfiringamechanism'with the:iner-.- TheprimaryobjeCt oftheinvention is topro-; tia piece movedrearwardlyxto. overlie: thesearof 5 vide asingletrigger mechanismfor double bar thesecond firing mechanism to preventunintene- 5"" relled' firearm's, the trigger niechanismbeing nontionalfiring? thereof;

seI'ect'iVe'and: firing from right tofleit it being Figure 3 is afragmentary'sideelevational view; understood however,-;that the; firingmechanism similar to Figure; 2, showing the trigger-releasedassociatedwith each barrel may be so designed to after operation of thefirstfiring mechanism the permit the firing to be from leitto right.slide lowered and moved forwardly'to engage'ibe 10 A further object ofthe inventionis toprovide heath the sear of'the' second or left hand'firing a: firearm of the double barrelIed typejembodymechanismfor theoperation thereof; j j i1'1'g single trigger mechanismfor each barrelFigure 4 is a cross-sectional "View taken on with a slide membercontrolledinits action by line 4-4 of Figure 3; showing the slideforming the firstfiring mechanism jtq iorm an interlockinterlockingconnection between the singletrig- 15' ing connection between thesingletrigger and, ger and the'searo-f the second firing mechanism the-secondfiring mechanismfwith the slide guidmovable in a slot formed inthebottom aller. ed in its movement through a slot in the lower lower tangof theigunframe and' in a biockirisingf tang or bottom wall ofthegunframe and also] from the bottom wall or tang; and H J guidedin itsmovethrough a passageway 'orslot Figure 5" shows perspective yiews ofthejfir-JO ina'block member rising from'thelower tangs. ing mechanisms;f I j1 A further object of-Ythe in iientionisto provide Referringmore indetail to thei'accompanyii igj a; firearmo'f the foregoing characterwherein the; drawings, there I is' illustrated a" single trig er? slidememberthat "forms anfinterlockingjconnec mechanism fordoubie barrelledfirearms wheretibn between the single trigg r and" the searbf in thefirearm includesa gun frame lolprovided'f the second'firingmechanismisin constant operawith right and left barrels .1'1andflzrespec tive; relation with respect to the trigger with tiv ely;thefirearm beingofthebreak-donortype meansto'permit"pivotal"movement'oftheslide embodying a. toplever 113;with upperandloweri" when thet'riggeris initiallyoperatedforthe firtangs 14 and-15 respectively projecting rear?" ing-of theyfirstfiring'- mechanism,theconnection wardlyof thejframe 10': Thejextreme: rear ends 30 between"the slide and"t'rigger being of a type of the-upper anddower tangsM and15 318 con to permit 'sliding mbvem'ents of the slide indenected by;aibolt' 16 while "the tangs arefurther" pendently of the trigger. 1 lconnected' together and *bra cediintermediate It is a iurtherobject ofthe invention to protheir-ends by the; boltfill dependingjfrom the] videafi'rearm of the foregoing character whereuppertang 1 4' andengagedfatitsllowerend with 135- in' the sear ofjthe secondfiringmechanismhas a the bloek 18 risingfrom 'the' lower'tank 1-5. The 7 blockmember'rising therefrom to be engaged by referencenumeral 19',designates a" part of the N atensioned inertia piecepivotall'ysuspended from bolting mechanisni of the gun and extends rear theuppertang oi the frameto prevent unintenwardlypitheframe portiondfl' tooccupytaposie;

* tional firing operation of thesecond firing mechtion between the upperand'lowerjtangs' l ifaridi-4n anism inthe presenceof recoil duringoperation 15. v of thefirst firingmechanism. v v 1 The trigger '20carries a plate" '21 "extending; With the above and" other objects inView that through a slot 22 pr0vided' in the" lower tang I15 k,

will'becomeapparent asthe nature of theinven and also through the sIot'22a in theblo'c'k 18f tion is {better understood, the same consists inasshown in Figure 4, the triggerp1ate21 .having 345" thenovei'fiorni;combination and arrangement an opening 23in one endthereofas shown in ofpartshereinafter more fully described, shown Figure 5 forpivotal mounting ;on the pin 24 p inthe acbompanying drawings andclaimed: carried by the block 18} The firing mechanism; In for the righthand-barrel 1]. inciudes aham'mei he drawings'F- =F igiirbill is arramemary sidefelevational view 25 having a notch 26 adjacentitspivotaiend1ofthe gun frame and portions of the barrels with to be engaged by; theend 27 of the sear 28 that the mech incocked positions, loohis-pivotall'y mounted as at 29. cross pin; is

ing 'at the righ eof thegun; r j carried by the pupp ri dee" oi thtrieeerplat Figurezi agmentarysideelevational view" 21* and projects atoppositef-sides thereof as :at

positioned beneath the free end of the sear 28 a lateral arm 38 directedtoward the sear 28 and positioned rearwardly of the'block 18. Forpurposes presently to appear, the rear end of the sear 36 carries ablock 39 rising therefrom.

The cross pin carried by'the trigger plate for the operation of thesear'28 of the right hand firing mechanism moves in a zone spaced fromthe operative end of the sear 36 of the left hand firing mechanism andto form communication between the cross pin on the trigger and the searof the left hand firing mechanism, there is provided a slide memberillustrated in the several figures and in detail in Figure 5as includinga plate'40 having a straight lower edge 41 moving in the slot 42parallel with the slot 22a in the block 18 and also in the slot 42a inthe lower tang 15.. The slideplate 40 is permitted both sliding andpivotal movementby' means of the slot 43 in the plate 40 receiving thetrigger pivot pin 24. In view of the location of the bolting mechanism19 rearwardly of the frame 10 and between the upper and lower tangs 14and 15, the forward'end of the slide plate 40 has been designed toescape the bolting mechanism in its sliding movement andfor operativeengagement with the hammer 25 of the right hand firing mechanism, theforward end of the slide plate 40,carrying angle rm extensions 44 and 45with the free end of the arm 45 engaged with the hammer'25 so that whenthe hammer ,25 is in cocked position, the slide plate 40 is movedrearwardly,guided insuch movement by the pivot pin 24'of the trigger andalso by the slots 42 and 42a in the block 18 and tang 15, the slideplate 40 moving rearwardly against tension of the spring 46 shown inFigure 2. The connection between the trigger pin 31 an slide plate 40includes an upper opening slot 47 in the rear end of the trigger plate40 into which the trigger pin 31 extends and is confined therein by the.forwardly extending lug 48 shown in Figures 2, 3 and 5 as overhangingthe slot 4'7. The firingniechanisms are provided with a safety devicefor rendering them inoperative, the safety device being manuallyoperable while the usual rod associated with the bolting mechanism forthe automatic setting of the safetydevice had to be done away with toprovide a clearance for the mounting of the coil member or inertiapiece. The inertia piece 49 of triangular formation is pivotallysuspended as at 50 from the upper tang -14,. being tensioned as at 5land mounted with relation to the block 39 carried bylthe sear 36 of theleft hand firing mechanism to be moved to .a position overlying theblock 39' during recoil action to prevent accidental firing of thesecond firing mechanism, the inertia piece 49 carrying a stop lug 52 forlimiting recoil movement of-Hthe inertia piece and assuring a recoilposition thereof during action. The safety for the firing mechanismincludes a block 53 pivotally mounted as at '54 upon the lower tang 15and as shown in Figure 1, carries a laterally projecting pin 46 to bemoved to a position overlying thetrigger plate 21 by means of the leg 55of a bell crank lever that is pivotally mounted as at 56 upon a, bracket57 rising from the tang 15 with the other leg 58 ofvthe bell crank leveroperated by a slide 59 disposed above the upper tang 14 and guided inits movement on the guide members 60 of the gun as illustrated in Figure1 in its cocked position. With the hammer 25 cocked, the slide plate 40is moved rearwardly against the tension of the spring 46, the slideplate being guided in its movement through the slots 42 and 42a in theblock 18 and tang 15 with the upper rear end 40a of the-slide plate 40positioned rearwardly of the lateralarm 38 carried by the sear 36 of theleft hand or second firing mechanism, but when the slide p1ate40 is atits limit of rearward movement, the cross pin 31 carried by the triggerplate 21 is still engaged in the slot 47 of the plate 40 so that whenthe trigger 20 is operated for releasing the right hand or first firingmechanism, the slide plate 40 pivotally moves upon the pivot pin 24 ofthe trigger that passes through the slide plate slot 43 with the rearend 40aof the slide plate-moving upwardly but escaping the lateral arm38 on the sear 36, this position being illustrated in Figure 2. When theright hand firing mechanism is released as illustrated in Figure 2, theinertia piece 49 swings to the position as illustrated above the block39 carried by the sear 36 to prevent accidental operation of said sear.When pressure on the trigger is relieved, the spring associated with thesear 28 restores the trigger to the position shown in Figure 3 and atwhich time the spring 46 moves the slide plate 40 forwardly to position,

the upper end 40a of the slide platebeneath the cross arm 38 of the sear36 for the operation of the sear of the left hand or second firingmechanism. As stated, the slide plate is guided in its movement throughthe slot 42a in the tang 15 and through the slot 42 in the block 18, theforward angle arm extensions 44 and45 on the slide plate being providedfor clearing the bolting mechanism 19 so that the free end of the arm 45is positioned for engagement with the hammer 25 to be controlled in itsoperation by said hammer. I

While there is herein shown and described the preferred embodiment ofthe invention, it is nevertheless to be understood that minor changesmay be made therein without departing from the spirit and scope of theinvention as claimed.

1. In a double barrelled firearm, wherein a separate firing mechanism isprovided for each barrel and including a hammer and a sear, wherein asingle trigger, is-in constant operative relation to one sear andwherein a single slide member is adapted to form connection between thetrigger and sear of the other firing mechanism, the gun including aframecarrying upper and lower tangs and the lower tang having a slot thereinforming a guide for the slide member, and 1 separate firing mechanism isprovided for each barrel and including a hammer and a sear, wherein, asingle, trigger is in constant operative relation to one sear andwherein a slide member is adapted to form connection between the triggerand sear of the other firing, mechanism, the gun including a framecarrying upper and lower tangs and the lowertang having a slot thereinforming a guide for the slide member, said'slide member having a slottherein receiving the pivot pin of the trigger and by which the slide isretained in position, a pin and slot connection between the trigger andslide member whereby the slide member is pivotally movable withthetrigger during each operation thereof, a block and post con-' nectionbetween the upper and lower tangs and said block having slots thereinaligning with the slots in the lower tang and through which the slidemember andtrigger move.

3. In a double barrelled firearm, wherein a separate firing mechanism isprovided for each barrel and including a hammer and a sear, wherein asingle trigger is in constant operative relation to one sear at one sideof theframe and wherein a slide member at the otherside of the frame isadapted to form connection between the trigger and sear of the otherfiring mechanism, the gun including a frame carrying upper and lowertangs and the lower tang having a slot therein forming a guide for theslide member, and an angle arm extension onthe forward end of the slidemember with the terminal end of the extension engaged with the hammer ofthe first firing mechanism at the other side of the frame permittingforward sliding movement ofthe slide member into position formechanism.' p

4. In a double barrelled firearm, wherein a separate firing mechanismisprovided for each barrel and including a hammer and a sear, wherein asingle trigger is in constant operative relation to one sear and whereina slide member is adapted to form connection between the trigger andsear of the other firing mechanism, the gun including a frame carryingupper and lower tangs and the lower tang having a slot therein forming aguide for the slide memben said slide member having a slot thereinreceiving the pivot pin of the trigger, a pin and slot connectionbetween the trigger and slide member whereby the slide member ispivotally movable with the trigger, and an angle arm extension on theforward end of the slide member with the terminal end of the extensionengaged with the hammer of the first firing mechanism permitting forwardsliding movement of the slide member.

5. In a double barrelled firearm, wherein a separate firing mechanism isprovided for each barrel and including a hammer and a sear, Wherein asingle trigger is in constant operative relation to one sear and whereina slide member is adapted to form connection between the trigger andsear of the other firing mechanism, the gun including a frame carryingupper and lower tangs and the lower tang having a slot therein forming aguide for the slide member, a block and post connection between theupper and lower tangs operation of the second firing and said blockhaving slots therein throughwhich the slide member and trigger move, andan angle arm extension on the forward end of the slide member with theterminal end of the extension engaged with the hammer of the firstfiring mechanism permitting forward sliding movement of the slidemember.

6. In a double barrelled firearm, wherein a separate firing mechanism isprovided for each barrel and including a hammer and a sear, wherein asingle trigger is in constant operative relation to one sear and whereina slide member is adapted to form connection betweenthe trigger and searof the other firing mechanism, the gun including a frame carrying upperand lower tangs and the lower tang having a slot therein forming a guidefor the slide member, said slide member having a slot thereinreceiving'the pivot pin of the trigger,-a pin and slot connectionbetween the trigger and slide member whereby the slide member ispivotally movable with the trigger, a block and post connection betweenthe upper and lower tangs and said block having slots therein throughwhich the slide member and trigger move, and angle arm extension on theforward end of the slide member with the terminal end of the extensionengaged with they hammer of the first firing mechanism permittingforward sliding movement of the slide member.

7. In a double barrelled firearm, wherein a separate firing mechanism isprovided for each barrel and including a hammer and a sear, wherein asingle trigger is in constant operative relation to one scar and whereina slide member is adapted to form communication between the trigger andsear of the other firing mechanism, the firearm including a framecarrying upper and lower tangs, bolting mechanism between the tangs atthe forward ends, a base block and bolt connection between the endsofthe tangs, the lower tang and block being slotted to accommodate themounting of the trigger and slide member and an angle arm extension onthe forward end of the slide member to clear the bolting mechanisms andengaged with the hammer of the first firing mechanism.

- 8. In a double barrelled firearm, wherein a separate firing mechanismis provided for each barrel and including a hammer and a sear, wherein asingle trigger is in constant operative relation to one scar and whereina slide member is adapted to form connection between the trigger andsear of the other firing mechanism, the gun including a frame carryingupper and lower tangs and the lower tang having a slot therein forming aguide for the slide member, an abutment block rising from the rear endof the sear of the second firing mechanism and a tensioned inertia piecepivotally suspended above the abutment block to be moved by recoilaction into engagement therewith to prevent accidental operation of thesecond firing mechanism.

' HARRY E. HOWLAND.

NESTOR F. SMITH.

